Both the boy in the poem and the boy in Araby suffer from separation anxiety. They both cannot accept the fact that reality has struck their "world". It is a realization that sometimes things don't go just as how you thought it would be, and it's a struggle to keep up with the truth.
Marguerite is working as maid at Mrs. Cullinan's house. She does't even try to remember Marguerite's name and insists in call her Mary. Also, Mrs. Cullinan behaves rudely with Marguerite, this strongly upsets Marguerite who is unable to quit the job because her mother doesn't let her, so she decides to drop Mrs. Cullinan's favorite dishes to get fired. After that Mrs. Cullinan starts to call her Margaret, which Marguerite accepts because is closer to her real name and she was happy that the woman admitted that her name wasn't Mary.